Tamper proof closure and method of manufacturing same

Details Tamper proof closure and method of manufacturing same Tamper proof closure and method of manufacturing same

1982-03-01

1984-01-03

Norton, Donald F.

Bottles and jars

Closures

Frangible member or portion

264156, B65D 4134

Patent

active

044238207

ABSTRACT:
A thermo-formed container closure having a breakaway ring including at least inwardly extending tab on the ring for engaging a lug on the container to prevent the ring from rotating as the closure top is unthreaded in which an annular flange joining the breakaway ring to the closure skirt wall is cut, except at a plurality of retaining bridges, with each of the bridges being of generally trapezoid shape and having a minimum area where the flange is attached to the closure skirt wall and a maximum area at the breakaway ring portion, to enhance the breakaway action as the ring is prevented from rotating.

REFERENCES:
patent: 4153174 (1979-05-01), Keeler
patent: 4225050 (1980-09-01), Reinhart

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